#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
int main()
{
	printf("begin:我是一个进程,pid: %d ,ppid: %d\n",getpid(),getppid());	
	pid_t id=fork();
	if(id==0)
	{
		//子进程
		while(1)
		{
			printf("我是子进程，pid: %d,pid: %d\n",getpid(),getppid());
			sleep(1);
		}
	}
	else if(id>0)
	{
		//父进程	
		while(1)
		{
			printf("我是父进程，pid: %d,pid: %d\n",getpid(),getppid());
			sleep(1);
		}
	}
	else
	{
		//error
	}
	
//	pid_t id=getpid();
//	while(1)
//	{	
//		printf("I am a process,pid is %d,ppid is %d\n",getpid(),getppid());	
//		sleep(1);
//	}
	return 0;
}



